SaaS & Business Metrics Calculator (CAC, LTV, MRR)
Calculate critical financial KPIs including Customer Acquisition Cost, Lifetime Value, and Churn Rate. Compare your results with industry benchmarks.
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About
In the subscription economy and digital business landscape, understanding unit economics is not merely analytical—it is survival. Metrics like CAC (Customer Acquisition Cost) and LTV (Lifetime Value) determine whether a business is scaling profitably or bleeding cash. Investors and founders rely on these ratios to assess the health of the revenue engine.
This calculator provides a comprehensive suite for deriving these key performance indicators instantly. Beyond simple arithmetic, it contextualizes your data by comparing it against standard industry benchmarks for B2B SaaS, E-commerce, and Agencies. Identifying a high churn rate or an unsustainable LTV:CAC ratio early allows for strategic pivots in pricing, retention, or acquisition channels.
Formulas
The relationship between the value of a customer and the cost to acquire them is the "Golden Ratio" of SaaS growth.
Where ARPU is Average Revenue Per User. Customer Acquisition Cost is defined as:
Reference Data
| Metric | B2B SaaS Benchmark | E-Commerce Benchmark | Agency/Service Benchmark |
|---|---|---|---|
| LTV:CAC Ratio | > 3:1 | > 2.5:1 | > 3:1 |
| Monthly Churn Rate | 0.5% - 2% | 3% - 5% | 2% - 4% |
| CAC Payback Period | 6 - 12 Months | Immediate - 3 Months | 1 - 3 Months |
| Gross Margin | 70% - 85% | 30% - 50% | 40% - 60% |
| Expansion Revenue | 10% - 30% | N/A (Repeat Purchase) | 10% - 20% |
| Trial Conversion | 15% - 25% | N/A | 20% - 40% |
| NPS Score | +40 | +50 | +60 |
| Annual Growth (Seed) | 100% - 300% | 50% - 100% | 30% - 50% |